Do not invoke indexed interceptor getters for negative indices.

src/arm/ic-arm.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1566 matching lines @@
   // ---------- S t a t e --------------
   //  -- lr     : return address
   //  -- r0     : key
   //  -- r1     : receiver
   // -----------------------------------
   Label slow;
 
   // Check that the receiver isn't a smi.
   __ BranchOnSmi(r1, &slow);
 
-  // Check that the key is a smi.
-  __ BranchOnNotSmi(r0, &slow);
+  // Check that the key is an array index, that is Uint32.
+  __ tst(r0, Operand(kSmiTagMask | kSmiSignMask));
+  __ b(ne, &slow);
 
   // Get the map of the receiver.
   __ ldr(r2, FieldMemOperand(r1, HeapObject::kMapOffset));
 
   // Check that it has indexed interceptor and access checks
   // are not enabled for this object.
   __ ldrb(r3, FieldMemOperand(r2, Map::kBitFieldOffset));
   __ and_(r3, r3, Operand(kSlowCaseBitFieldMask));
   __ cmp(r3, Operand(1 << Map::kHasIndexedInterceptor));
   __ b(ne, &slow);
@@ skipping 651 matching lines @@
   GenerateMiss(masm);
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM